Lacustrine and Associated Deposits in a Rifted Continental Margin—Lower Cretaceous Lagoa Feia Formation, Campos Basin, Offshore Brazil

1990 ◽  
pp. 287-305 ◽  
Keyword(s):  
Continental Margin ◽  
Lower Cretaceous ◽  
Campos Basin ◽  
Rifted Continental Margin

scholarly journals Facies and depositional environments for the coquinas of the Morro do Chaves Formation, Sergipe-Alagoas Basin, defined by taphonomic and compositional criteria

2015 ◽  
Vol 45 (3) ◽  
pp. 415-429 ◽  
Author(s):  
Ana Carolina Tavares ◽  
Leonardo Borghi ◽  
Patrick Corbett ◽  
Jane Nobre-Lopes ◽  
Raphael Câmara
Keyword(s):  
Continental Margin ◽  
Carbonate Rocks ◽  
Sedimentary Facies ◽  
High Energy ◽  
Depositional Environments ◽  
Campos Basin ◽  
Lacustrine Carbonate ◽  
Paleoenvironmental Interpretation ◽  
Reservoir Description ◽  
Facies Succession

Lacustrine carbonate rocks form important hydrocarbon accumulations along the Brazilian continental margin, some of which are contained in oil fields in which coquinas are one of the main reservoirs (viz. Campos Basin). The complexity and heterogeneity of these deposits make them a challenge in terms of reservoir description. For the necessary classification and paleoenvironmental interpretation of the coquinas, it is essential to evaluate many aspects including biological (such as carbonate productivity), sedimentological (energy regime in the depositional environment, transport of bioclasts, terrigenous supply), taphonomic (fragmentation of shells, abrasion) and diagenetic processes. The facies analysis applied in this study is considered a more appropriate classification approach to understand these coquinas, since it is more flexible and comprehensive than the existing classifications for carbonate rocks. The material investigated here consists of rock samples of the coquinas from the Atol Quarry of the Morro do Chaves Formation (Barremian/Aptian), Sergipe-Alagoas Basin. These rocks that crop out in the Atol quarry complex can be considered as a case study for similar coquinas reservoirs found in the Brazilian continental margin basins. Six sedimentary facies were described, using the main taphonomic (fragmentation of shells) and compositional (presence of micrite and siliciclastic matrix) features as a diagnostic criteria. Two carbonate facies, two mixed carbonate-siliciclastic facies and two siliciclastic facies (mudstones) were identified. From the facies succession, combined with a review of the literature on the subject, the following depositional paleoenvironments were defined: high-energy lake platform, lacustrine delta in a high-energy lake platform and lake-centre. In this paper, a new facies model for the studied coquinas succession is proposed.

scholarly journals Evolution of the Kap Edvard Holm Complex: a Mafic Intrusion at a Rifted Continental Margin

1996 ◽  
Vol 37 (3) ◽  
pp. 497-519 ◽  
Author(s):  
STEFAN BERNSTEIN ◽  
PETER B. KELEMEN ◽  
C. KENT BROOKS
Keyword(s):  
Continental Margin ◽  
Mafic Intrusion ◽  
Rifted Continental Margin

scholarly journals The Norfolk Ridge seamounts: Eocene–Miocene volcanoes near Zealandia’s rifted continental margin

2020 ◽  
pp. 1-13
Author(s):  
N. Mortimer ◽  
M. Patriat ◽  
P. B. Gans ◽  
A. Agranier ◽  
G. Chazot ◽  
...  
Keyword(s):  
Continental Margin ◽  
Rifted Continental Margin

scholarly journals The Alegre Lineament and its role over the tectonic evolution of the Campos Basin and adjacent continental margin, Southeastern Brazil

2016 ◽  
Vol 69 ◽  
pp. 226-242 ◽  
Author(s):  
Salomão Silva Calegari ◽  
Mirna Aparecida Neves ◽  
Felipe Guadagnin ◽  
George Sand França ◽  
Maria Gabriela Castillo Vincentelli
Keyword(s):  
Continental Margin ◽  
Tectonic Evolution ◽  
Southeastern Brazil ◽  
Campos Basin

scholarly journals Crustal structure of the Goban Spur rifted continental margin, Ne Atlantic

1994 ◽  
Vol 119 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Susan J. Horsefield ◽  
K. Robert B. Whitmarsh ◽  
Robert S. White ◽  
Jean-Claude Sibuet
Keyword(s):  
Continental Margin ◽  
Crustal Structure ◽  
Ne Atlantic ◽  
Rifted Continental Margin ◽  
Goban Spur
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